The presence of polders in southwestern Bangladesh leading to gradual silting up of rivers which, in turn, has resulted in serious waterlogging rendering large tract of land uncultivable. The current practice to solve this issue is temporarily de-poldering by cutting embankment. It allows natural movement of sediment-borne tidal water into a selected beel known as tidal basin and allows deposition of sediment. Sedimentation determines the life span of basin and the rate of raising the land. It is essential that better understanding of sedimentation process is required. One significant hydraulic fact is that the faster the flow is, the more sediment it can carry with it. One of the key governing factor of the flow is opening size of link canal. In this research, attempts have been made to inspect the effectiveness of tidal basin management investigating different opening sizes of link canal through laboratory experiments and preliminary numerical simulation. Our finding shows sediment carrying capacity is a function of velocity. Moreover, only increasing the opening size of link canal will not allow more sediment to deposit in selected tidal basin. It is also found in experiment that near the embankment, where tidal flow enters during high tide and leaves during low tide, vortex like formation tries to erode the material which in real case also happens. Developed numerical model has good agreement with experimental results and can be used to better understand effectiveness of tidal basin management.